EPDCCH Dynamic Resource Allocation for Idle Mode Paging
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Solution Overview
Problem
Current cellular communication technologies do not efficiently account for the varying device and application characteristics, leading to inefficient operations in wireless communication systems.
Innovation Solution
Implementing an enhanced physical downlink control channel (EPDCCH) that allocates resources based on bandwidth and control information needs, allowing for a common search space that wireless devices can use to receive control information even in idle mode, by dynamically selecting and allocating resource blocks throughout the cell bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink resources are allocated to provide EPDCCH in subframes, then control information can be provided to wireless devices, but resource use efficiency deteriorates when there is no control information to transmit
Solution Approach 1:
The patent implements dynamic resource allocation for EPDCCH where the base station determines whether to allocate resources based on actual control information needs. The system transitions between having EPDCCH resources allocated and not allocated depending on whether control information requires transmission, making the resource allocation flexible and adaptive rather than static
Solution Approach 2:
When there is no control information to transmit, the patent allows EPDCCH resources to be discarded (not allocated) and recovered for other uses such as physical downlink shared channel. This enables the system to reuse resources that would otherwise be wasted, improving overall resource utilization efficiency
2Quantity of substance
If all resources specified for EPDCCH use are allocated, then control information capacity is maximized, but resource use efficiency deteriorates when control information volume is small
Solution Approach 1:
The patent implements partial resource allocation where the base station allocates only the necessary portion of EPDCCH resources required for the actual control information volume. Instead of always allocating all specified resources, the system uses partial allocation matching the actual needs, avoiding waste of excess resources while ensuring sufficient capacity when needed
3Adaptability or versatility
If EPDCCH resources are allocated based on maximum bandwidth, then control information can be provided to all device types, but resource efficiency deteriorates for devices with smaller bandwidth requirements
Solution Approach 1:
The patent implements local quality adaptation where resource allocation is customized according to the specific bandwidth requirements of different device types and applications. Instead of uniform maximum bandwidth allocation for all devices, the system adjusts the quality and quantity of resources locally matched to each device's actual characteristics and needs
Data Source
AI summary
This disclosure relates to techniques for transmitting and receiving control information in the common search space on an enhanced physical downlink control channel (EPDCCH). According to some embodiments, a cellular base station may allocate some resource blocks of a subframe as the EPDCCH. The cellular base station may provide control information on a common search space in the EPDCCH for wireless user equipment (UE) devices in the cell provided by the cellular base station during a subframe. A UE device may monitor the EPDCCH to determine whether any indication on the common search space decodable by the UE device is contained in the EPDCCH, and may decode such information if present.